{{define "menu"}}
    <div class="col-md-3">
        <div class="list-group">
            <a href="/posts/index"  class="list-group-item {{.active1}}">学生列表</a>
            <a href="/posts/create" class="list-group-item {{.active2}}">新增学生</a>
        </div>
    </div>
{{end}}